Nice! The hair is neat, centering the hair really works. The image is smooth and clean. The blue is deep and rich. Great expression on the model's face.
I would have like to see some of the sky cropped and as it was advanced editing maybe you could have selected the jump suit and lightened it a bit. Nice shot though.
Normally I'd say a background like this is a little busy and leaning toward 'snapshot' but I think it works. The selective desaturation is good too. What really makes the image is the hair and her expression, both are great and add to the title. You just have to smile at the obvious fun she is having. Not sure about all that negative space at the top although I can understand why you have it there. Cropping some of it off put a little more emphasis on the blue dungarees.